John Gill's Bible Commentary Ver. 2. Take you twelve men out of the people , etc.] Joshua had before this ordered twelve men to be taken from among them, which seems to have been done of himself; and now he has a direction from God for it, and what to employ them in: out of every tribe a man ; so that what they did was in the name of the several tribes, and as representing them.
Matthew Henry Commentary
Verses 1-9 - The works of the Lord are so worthy of rememberance, and the heart of man is so prone to forget them, that various methods are needful to refresh our memories, for the glory of God, our advantage, and that of our children. God gave orders for preparing this memorial.
Original Hebrew קחו3947 לכם מן4480 העם5971 שׁנים8147 עשׂר6240 אנשׁים582 אישׁ376 אחד259 אישׁ376 אחד259 משׁבט׃7626